A 2.5L solution of hand sanitizer has a density of 1.25g/mL, what is the mass of the solution in grams?

313 g

Explanation:

The formula for density is in Litters (L).

Given that the density is 1.25 and that the solution is 2.5

You first have to plug in what is given into the density formula like so but note that the answer is in milliliters not Litters so you have to convert in milliliters like so or Which equals 2,500mL next you do simple math like so

or the Mass

 but that not the answer because you need to round to 3 significant figure so your actual answer is  

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :